AS/400. Mainframe. One CSV at midnight.
The systems that ran your business for 25 years are now holding it back. You can't replace them this year. You can't live with them another.
AS/400, mainframe, nightly CSV exports: systems older than your CTO. Fix it with Microsoft Fabric shortcuts + Power Platform automation + API abstraction. 12 manual extracts automated, 3 new use cases shipped without touching legacy.
If half of these sound familiar, this is your fight.
No formal assessment needed, just an honest look at the daily friction.
Critical data is exported as nightly CSVs from systems older than your CTO.
New initiatives wait on a single integration team that's already overbooked.
Replacing the legacy system is a multi-year, multi-million project, and it keeps slipping.
Knowledge of the legacy system lives in two heads, both nearing retirement.
Audit trails on legacy data are partial, manual or missing.
Real-time use cases are blocked because the legacy systems don't expose APIs.
Why it happens
No replacement plan
Replacement projects keep getting de-prioritised because the system "still works", until it doesn't.
No abstraction layer
Every new project integrates directly with legacy, multiplying coupling, risk and effort.
Knowledge concentration
A handful of engineers hold the keys. When they leave, half the operational knowledge leaves with them.
What it costs you
Innovation tax
Every new initiative pays a 30% legacy integration tax, in time, money and risk.
Operational risk
A single point of failure in a critical system, with no documentation and no clear failover plan.
Compliance debt
Audit trails, retention rules and access controls are partial, which means every audit is a sprint.
The shortest path from problem to results.
Microsoft-first stack. Belgian and Estonian engineering. Senior team kickoff through delivery to support.
Microsoft Fabric backbone with shortcuts
OneLake shortcuts to legacy data, so new initiatives ship without touching the old systems.
See solutionAPI & event abstraction layer
Decouple legacy from new initiatives via Power Platform, Logic Apps and Event Hubs. Phase replacement at your own pace.
See solutionPower Platform automation
Replace manual extracts and Excel handovers with citizen-developer flows: low-risk, high-leverage wins.
See solutionWhen a 1995 AS/400 finally became part of the modern stack.
Fabric shortcuts + Power Platform: legacy unlocked
A Flemish manufacturer with a 30-year AS/400 system that nobody could replace. We exposed legacy data via Fabric shortcuts and Logic Apps, automated 12 manual extracts via Power Automate, and shipped three new analytical use cases, without touching the AS/400. Replacement now planned in waves over 2026-2027.
Legacy doesn't have to be destiny. Let's phase it out.
Free 60-minute legacy audit: we'll show you what to unlock first, what to retire later.
Common questions, direct answers.
Do we have to replace legacy to modernise data?
No, and you usually shouldn't lead with replacement. Expose legacy via Fabric shortcuts and Logic Apps, ship value on top, then replace at your pace, or never.
What if our legacy system has no API?
CSV nightly + SFTP gives you a starting point. Power Automate desktop flows can RPA legacy UI. Power Platform connectors cover even older systems (AS/400, SAP older releases).
How do we get real-time data from a batch-only legacy system?
You can't, but you rarely need to. We expose CDC (change data capture) where supported, hourly snapshots where not. Real-time is overrated for 80% of use cases.
When SHOULD we replace legacy?
When the cost of NOT replacing exceeds the cost of replacing: knowledge concentration risk, compliance gaps you can't close, vendor end-of-life. Otherwise, abstraction beats replacement.
How do we avoid the "modernise once, modernise forever" trap?
Build for evolutionary architecture: domain-driven service boundaries, message-based integration, data contracts, continuous deployment. So the next replacement takes weeks, not years.